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Renesas 7143SA90GB
- Part No.:
- 7143SA90GB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143SA90GB.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,828
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Product details
Overview
7143SA90GB from IDT is a high-speed 2K × 16 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting 90ns max read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C), used for real-time inter-processor communication in avionics data concentrators.
For engineers reviewing the 7143SA90GB datasheet, 7143SA90GB pinout, 7143SA90GB application, or 7143SA90GB equivalent, this page delivers verified timing parameters, BUSY-input arbitration behavior, byte-select write control per port, 68-pin PLCC package mapping, and direct alternatives for dual-port SRAM width-expansion designs.
Technical Context
The 7143SA90GB operates fully asynchronously from either port with independent address, control, and I/O pins; its BUSY pin functions exclusively as a write-inhibit input-unlike the MASTER 7133's open-drain BUSY output-enabling deterministic contention resolution in multi-chip 32-bit+ systems.
It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), on-chip power-down via CE-driven standby mode, and battery backup data retention at 2V (LA variant only); the SA suffix confirms standard-power operation with 1150mW typical active power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total), enabling 16-bit parallel data exchange between two independent bus masters. |
| Max Read Cycle Time | 90 ns (industrial grade), defining minimum clock-to-clock interval for reliable consecutive reads without wait states. |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), compatible with legacy TTL logic families and eliminating need for level-shifting circuitry. |
| Operating Temperature | –40°C to +85°C, qualified for industrial embedded control systems including motor drives and programmable logic controllers. |
| Active Current (Typ.) | 230 mA at 90 ns speed, corresponding to ~1150 mW typical power dissipation under full dual-port access load. |
| Standby Current (Typ.) | 25 mA (TTL-level inputs, both ports disabled), enabling low-power idle states in battery-backed or energy-sensitive applications. |
| Bus Interface | Dual independent 16-bit bidirectional I/O ports (I/O0L–I/O15L and I/O0R–I/O15R) with separate CE, OE, and byte-write controls. |
Pinout & Package
7143SA90GB is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), requiring both VCC pins (pins 17 and 44) and both GND pins (pins 26 and 43) to be connected for stable operation; body dimensions are approximately 0.95 in × 0.95 in × 0.17 in.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable controlling port-specific power-down; when HIGH, respective port enters standby with I/O in high-Z. |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Asserts write to I/O8–I/O15 of left/right port independently-critical for partial-word updates without read-modify-write overhead. |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Enables write to I/O0–I/O7 of left/right port separately, supporting byte-granular memory writes in mixed-endian systems. |
| OEL / OER | Output Enable (Left / Right) | Controls tri-state output drivers; allows one port to drive data while other remains isolated during arbitration. |
| BUSYL / BUSYR | Busy Input (Left / Right) | As SLAVE, these pins accept BUSY signals from MASTER 7133 to gate write operations-preventing simultaneous writes to same address. |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address buses selecting one of 2K locations per port; no internal address latching-fully combinatorial access. |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | Two independent 16-bit bidirectional data paths; direction controlled by R/W and OE, not by external transceivers. |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input architecture | Eliminates need for external arbitration logic when paired with 7133 MASTER, reducing BOM count and PCB area in width-expanded systems. |
| Independent byte-write control per port | Enables atomic 8-bit updates to upper/lower halves of 16-bit words-essential for register-mapped peripherals and protocol stacks. |
| Full asynchronous dual-port operation | Permits concurrent read/write access from two CPUs or DMA engines without clock domain synchronization or handshaking overhead. |
| TTL-compatible 5V interface | Direct interfacing with legacy microcontrollers (e.g., Intel 80C188, Motorola 68EC000) and FPGAs without voltage translation. |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in uncontrolled environments like factory automation cabinets and outdoor telecom nodes. |
Applications
| Avionics Data Concentrator | Industrial PLC Backplane |
|---|---|
|
Use Scenario: Real-time acquisition of sensor data from multiple flight control surfaces and consolidation into a unified ARINC 429 message stream. IC Role / Device Role / Timing Role: SLAVE 7143SA90GB buffers incoming analog-to-digital converter outputs while MASTER 7133 arbitrates CPU read requests-ensuring deterministic <90ns latency. Use Value: Eliminates software polling loops; hardware BUSY gating guarantees atomic access to shared telemetry buffers across redundant flight computers. |
Use Scenario: Synchronized I/O scanning across 16 digital input modules and 16 output modules in a modular PLC rack. IC Role / Device Role / Timing Role: 7143SA90GB serves as dual-ported scratchpad memory between ladder logic processor (left port) and fieldbus controller (right port), operating at 90ns cycle time. Use Value: Enables scan-cycle jitter below 1 µs-meeting IEC 61131-3 soft-PLC determinism requirements without custom ASICs. |
| Medical Imaging Frame Buffer | Test Equipment Pattern Generator |
|
Use Scenario: Storing successive lines of X-ray detector pixel data during CT gantry rotation before reconstruction processing. IC Role / Device Role / Timing Role: Paired 7143SA90GB devices act as ping-pong line buffers-left port accepts ADC stream, right port feeds FPGA image pipeline at 90ns access rate. Use Value: Sustains 120 MB/s sustained bandwidth (16-bit × 7.5 MHz) with zero dropped frames during continuous acquisition. |
Use Scenario: Generating high-fidelity digital stimulus patterns for ATE systems testing mixed-signal SoCs. IC Role / Device Role / Timing Role: 7143SA90GB stores precomputed test vectors; left port loaded by host PC, right port streamed to pattern sequencer at precise 90ns intervals. Use Value: Achieves sub-nanosecond edge placement accuracy by decoupling vector generation from delivery timing-no CPU intervention required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1335KV18-90BGXI | 18-bit bus width, 90ns, QDR-II+ architecture with separate read/write clocks-not pin-compatible; requires PCB redesign. | Targeted at high-throughput networking buffers, not MASTER/SLAVE arbitration systems. | Select only if migrating to wider data paths and abandoning IDT's BUSY-based arbitration scheme. |
| IS61LV25616AL-90TQLI | Single-port, 256K × 16, 90ns, 3.3V core-lacks dual-port capability, BUSY logic, or byte-write enables. | Suitable for simple frame buffers but cannot replace 7143SA90GB in inter-processor communication roles. | Use only as cost-optimized drop-in for non-contention, single-CPU memory extensions. |
Compared with CY7C1335KV18-90BGXI and IS61LV25616AL-90TQLI, the 7143SA90GB uniquely delivers hardware-enforced write arbitration via dedicated BUSY inputs, enabling deterministic 32-bit+ width expansion without external logic-making it irreplaceable in legacy real-time control architectures.
Availability
7143SA90GB is available at Aetrix Electronics and suitable for avionics data concentrators, industrial PLC backplanes, medical imaging frame buffers, and test equipment pattern generators requiring stable component supply across extended product lifecycles.
Supply support for 7143SA90GB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, acquired by Renesas Electronics in 2019.
The 7143SA90GB belongs to IDT's legacy dual-port SRAM product line designed specifically for deterministic inter-processor communication in military, industrial, and aerospace systems requiring hardware arbitration and wide-bus expansion.
FAQ
What is the role of 7143SA90GB in a MASTER/SLAVE dual-port RAM configuration?
The 7143SA90GB functions exclusively as the SLAVE device: its BUSYL and BUSYR pins accept BUSY signals from a MASTER 7133 to inhibit writes during address contention. Unlike the MASTER, it has no internal arbitration logic-relying entirely on external BUSY assertion to prevent data corruption. This architecture eliminates "busy lock-out" in multi-chip 32-bit systems.
Does 7143SA90GB support battery backup data retention?
No-the 7143SA90GB is the SA (standard power) variant; battery backup data retention at 2V is only supported by LA variants (e.g., 7143LA90GB). The SA version specifies 1150mW typical active power and 5mW standby, confirming absence of low-voltage retention circuitry.
Which package options are available for 7143SA90GB?
The 7143SA90GB is offered in 68-pin PLCC (plastic leaded chip carrier), 68-pin ceramic PGA, 68-pin flatpack, and 100-pin TQFP. The 'GB' suffix in the part number specifically denotes the 68-pin PLCC package with industrial temperature range (–40°C to +85°C) and 90ns speed grade.
Can 7143SA90GB operate with a 3.3V supply?
No-7143SA90GB is strictly a 5V ±10% device (4.5–5.5V). Its DC characteristics-including VIH = 2.2V min and VOL = 0.4V max-are specified only for 5V operation. Using 3.3V violates absolute maximum ratings and will result in undefined logic levels and potential latch-up.
How does byte-write enable functionality work on 7143SA90GB?
7143SA90GB provides four independent byte-write controls: R/WLUB and R/WLLB for the left port (I/O8–I/O15 and I/O0–I/O7), and R/WRUB and R/WRLB for the right port. Asserting only R/WLUB enables writing to upper byte while preserving lower byte contents-eliminating read-modify-write cycles in register-file applications.
7143SA90GB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 32Kbit
- Memory Organization:
- 2K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 90ns
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7143SA90GB FAQ
1.How can I place an order for 7143SA90GB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA90GB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 7143SA90GB reliable?
The price and inventory of 7143SA90GB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA90GB is usually 5 days.
3.What payment methods are accepted for 7143SA90GB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA90GB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA90GB?
7143SA90GB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA90GB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 7143SA90GB?
For technical support, including 7143SA90GB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA90GB requirements.
6.How does Aetrix verify that 7143SA90GB is sourced from the original manufacturer or authorized distributors?
All 7143SA90GB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 7143SA90GB meets industry standards.
7.What is the process for return or replacement of 7143SA90GB?
All 7143SA90GB units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA90GB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 7143SA90GB part is unused and in its original packaging.
Return procedure for 7143SA90GB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA90GB Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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